The big problem is that most people that download Ubuntu 10.04 do not know that there is a difference between 32-bit and 64 bit.
Installing Ubuntu 64-bit, Adobe Flash works for videos, but it does not not recognize any mouse clicks. Installing Ubuntu 32-bit, Adobe Flash works 100%. Therefore, for those wondering why Adobe Flash works partially, the answer may lie in the version of Ubuntu installed.
Adobe shows one how to get Flash working on 64-bit OS’s at http://kb2.adobe.com/cps/000/6b3af6c9.html#main_installLinux
Although, I have not seen a 64-bit or 32-bit version of Firefox. Therefore, I assume that Firefox 32-bit is the one distributed. In any case, Adobe does have another alternative. Installing a wrapper that will allow Adobe Flash to work on Ubuntu 10.04 64-bit. It is worth a try for those that insist on using Ubuntu 64-bit.